21=7+r

Simple and best practice solution for 21=7+r equation. Check how easy it is, and learn it for the future. Our solution is simple, and easy to understand, so don`t hesitate to use it as a solution of your homework.

If it's not what You are looking for type in the equation solver your own equation and let us solve it.

Solution for 21=7+r equation: 



21=7+r

We move all terms to the left:

21-(7+r)=0

We add all the numbers together, and all the variables

-(r+7)+21=0

We get rid of parentheses

-r-7+21=0

We add all the numbers together, and all the variables

-1r+14=0

We move all terms containing r to the left, all other terms to the right

-r=-14

r=-14/-1

r=+14

See similar equations:

| 5(2-x)=3+4x | | 10d+5=18d-6/2 | | 4-x/4=2 | | −7h+12=47 | | 3(w-2)=7w+6 | | -1/2+3/5w=-2/3 | | g-12/2=3g/2-3 | | 7,50+1,50a=25,50 | | 6(x-5)=6x+11 | | -3x+1=x+114-8 | | a−12=1 | | 20p−11p=9 | | 8d=2d-6 | | 3/5x=-16 | | -3/2x-2=12 | | 56x-14=-x-62 | | .25x+.39(84-x)=84 | | 117-v=195 | | 3x=3x=4 | | f-1-9=46 | | 2x=3x=3x=4 | | 7=-5r-3-5r | | -10p−-20p+-15=15 | | |3x+4|=|2x-9| | | 9a-16=3+8a | | 1+4r-6=-17 | | -5(m-8)=25 | | -16x+32=36-18x | | y=-4+0.5 | | 2j+54=136+7j | | 11=b+5+5b | | 2+7y-3y=18 |

Equations solver categories